干旱区生态环境知识资源中心(Arid): 地面加热对沙尘暴数值模拟结果的影响研究

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	地面加热对沙尘暴数值模拟结果的影响研究
其他题名	Effects of Surface Heating Flux on the Numerical Simulation Results of Dust Storm
	姜学恭 1; 李彰俊 1; 程丛兰 2; 胡英华 1; 张伯禹 1; 赵淑惠 3
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2010
卷号	30 期号:1 页码:182-192
中文摘要	利用沙尘数值预报模式并针对2002年3月18-20日典型沙尘暴过程,模拟研究了地面热通量对沙尘暴的影响及其机制.结果发现,沙尘天气数值预报模式较准确地模拟了本次沙尘暴过程.模式对白天地面加热强度和夜间地面冷却强度均有一定程度的高估.地面热通量能够使沙尘暴明显增强,同时也通过导致地面风速、层结稳定度、地面摩擦速度产生明显的日变化,进而导致沙尘暴强度的日变化.地面热通量影响地面风速的方式是导致混合层形成,从而有利于产生高空动量下传.另外,沙尘暴发生时地面热通量主要影响地面和行星边界层中的天气要素,随时间推移地面热通量能够持续影响上升运动强度,且这一影响从边界层逐渐向上扩展到自由大气,并达到500 hPa以上.
英文摘要	A dusty weather numerical prediction model was used to simulate the effects of the surface heating flux on the dust storm. The case is a super severe dust storm process occurred in eastern Asia from Mar. 18 to Mar. 20,2002. This dust storm process was successfully simulated by the model. The simulated dusty weather regions corresponded to the observational regions. But the simulated intensity of surface heating in daytime and the surface cooling at night was overrated. In the desert region of Inner Mongolia the surface sensitive heating flux brought a net heating to the atmosphere. The surface heating flux enhanced the intensity of dust storm. Meanwhile,it enhanced the daily change of intensity of dust storm seriously through enhancing the daily change of surface wind speed,the stratification instability in lower atmosphere and the surface friction velocity. The main mechanism of surface heating flux influencing the surface wind speed is that it can lead a mixed layer (ML) in the lower atmosphere and so the downward transportation of momentum was enhanced. Through this mechanism the strength of surface wind speed and the friction velocity are enhanced. In addition,the advection of air in ML contributed to the sustaining and expanding of ML. The influencing process of surface heating flux can be divided to two phases. In the dust storm formation phase,the surface heat flux mainly affected the weather elements in the PBL(planetary boundary layer) and at surface,such as the surface wind speed,the stratification stability and surface friction velocity discussed above. In the second phase,the surface heating flux enhanced the ascending motion from the lower troposphere up to the middle troposphere according with the time processing. This influence can touch the height above 500 hPa.
中文关键词	沙尘暴 ; 数值模拟 ; 地面热通量
英文关键词	dust storm numerical simulation surface heat flux
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:3821789
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225953
作者单位	1.内蒙古自治区气象台, 呼和浩特, 内蒙古 010051, 中国; 2.北京城市气象研究所, 北京 100089, 中国; 3.内蒙古气象信息中心, 呼和浩特, 内蒙古 010051, 中国
推荐引用方式 GB/T 7714	姜学恭,李彰俊,程丛兰,等. 地面加热对沙尘暴数值模拟结果的影响研究[J],2010,30(1):182-192.
APA	姜学恭,李彰俊,程丛兰,胡英华,张伯禹,&赵淑惠.(2010).地面加热对沙尘暴数值模拟结果的影响研究.中国沙漠,30(1),182-192.
MLA	姜学恭,et al."地面加热对沙尘暴数值模拟结果的影响研究".中国沙漠 30.1(2010):182-192.